Samsung SGH-x497 Series User Manual page 126

Animal experiments investigating the effects of radio frequency energy
(RF) exposures characteristic of wireless phones have yielded
conflicting results that often cannot be repeated in other laboratories. A
few animal studies, however, have suggested that low levels of RF could
accelerate the development of cancer in laboratory animals. However,
many of the studies that showed increased tumor development used
animals that had been genetically engineered or treated with cancer-
causing chemicals so as to be pre-disposed to develop cancer in
absence of RF exposure. Other studies exposed the animals to RF for up
to 22 hours per day. These conditions are not similar to the conditions
under which people use wireless phones, so we don't know with
certainty what the results of such studies mean for human health.
Three large epidemiology studies have been published since December
2000. Between them, the studies investigated any possible association
between the use of wireless phones and primary brain cancer, glioma,
meningioma, or acoustic neuroma, tumors of the brain or salivary gland,
leukemia, or other cancers. None of the studies demonstrated the
existence of any harmful health effects from wireless phones RF
exposures. However, none of the studies can answer questions about
long-term exposures, since the average period of phone use in these
studies was around three years.
What research is needed to decide whether RF exposure
from wireless phones poses a health risk?
A combination of laboratory studies and epidemiological studies of
people actually using wireless phones would provide some of the data
that are needed. Lifetime animal exposure studies could be completed
in a few years. However, very large numbers of animals would be needed
to provide reliable proof of a cancer promoting effect if one exists.
Epidemiological studies can provide data that is directly applicable to
human populations, but ten or more years' follow-up may be needed to
provide answers about some health effects, such as cancer. This is
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